Answer:
New instruments and better methods of travel provided by Prince Henry's school of Navigation ( C )
Explanation:
The Age of exploration i.e traveling to several unknown and new places around the world was as a result of New instruments and better methods of travel that the school of Navigation provided. these new methods and instruments made travelling fun and easy to propagate better than how it was done previously.
The New luxuries brought home by the Crusaders was a product of exploration and not a cause of the age of exploration, likewise the new information and wealth brought from China by Polo.
